Rubber accelerator refers to rubber vulcanization accelerator. The vulcanization of rubber is mainly carried out by sulfur, but the reaction between sulfur and rubber is very slow, so the vulcanization accelerator came into being. The accelerator added to rubber compound can promote the activation of vulcanizing agent, thus accelerating the cross-linking reaction between vulcanizing agent and rubber molecules, and achieving the effects of shortening vulcanization time and reducing vulcanization temperature. According to the chemical structure, the main vulcanization accelerators are sulfenamide, thiazole and Qiu Lan, and some guanidine, thiourea and dithiocarbamate. Among them, sulfenamides have the best comprehensive properties and are widely used.

Rubber accelerator is the aftereffect accelerator of natural rubber, cis-butadiene rubber, isoprene rubber, styrene-butadiene rubber and reclaimed rubber. Usually used for manufacturing cables, adhesive tapes, rubber shoes, inner tubes, colored products, etc. It is especially suitable for strong alkaline carbon black compound. Safe working temperature, strong scorch resistance, fast vulcanization speed and high tensile strength, which can improve the utilization rate of synthetic rubber. Low toxicity and high efficiency, it is an ideal substitute for NOBS and has excellent comprehensive performance, so it is called standard accelerator. Widely used in radial tire production. It can be used together with aldehyde amine, guanidine and Qiu Lan accelerator, and when it is used together with anti-coking agent PVI, a good vulcanization system is formed. Mainly used for manufacturing tires, rubber shoes, hoses, tapes and cables.

There are still different opinions on the vulcanization mechanism of rubber. This is because there are insoluble natural rubber samples and a large number of reactions in the production process of rubber products, which makes it difficult for people to study the vulcanization of rubber molecules into complex polymer networks. The vulcanization mechanism of rubber proposed in the early stage can be roughly divided into two types: free radical mechanism and ionic mechanism. Researchers such as Bacon and Famer believe that the allyl vibration of rubber makes the hydrogen on the methylene group adjacent to its double bond easily replaced.

Therefore, in the process of rubber vulcanization, it is the beginning of the reaction that sulfur bis-radical takes hydrogen from rubber α-methylene. That is, the reaction process is a free radical process. Bateman and others think that the power supply of the double bond on rubber breaks the -SS- bond of S8 and decomposes it into ions, that is, the vulcanization process is an ion reaction process. So far, the vulcanization promotion mechanism of zinc thiazole and zinc dithiocarbamate has been well studied.